NO174782C - Method of backwashing a strainer in a pulping apparatus - Google Patents

Method of backwashing a strainer in a pulping apparatus

Info

Publication number
NO174782C
NO174782C NO893301A NO893301A NO174782C NO 174782 C NO174782 C NO 174782C NO 893301 A NO893301 A NO 893301A NO 893301 A NO893301 A NO 893301A NO 174782 C NO174782 C NO 174782C
Authority
NO
Norway
Prior art keywords
screen
pulp
inlet
liquid
piston
Prior art date
Application number
NO893301A
Other languages
Norwegian (no)
Other versions
NO893301L (en
NO893301D0 (en
NO174782B (en
Inventor
Finn Jacobsen
Ole J Richter
Original Assignee
Kamyr Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kamyr Ab filed Critical Kamyr Ab
Publication of NO893301D0 publication Critical patent/NO893301D0/en
Publication of NO893301L publication Critical patent/NO893301L/en
Publication of NO174782B publication Critical patent/NO174782B/en
Publication of NO174782C publication Critical patent/NO174782C/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0307—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements
    • B01D33/0315—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements arranged for inward flow filtration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/04—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in diffusers ; Washing of pulp of fluid consistency without substantially thickening
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/40—Washing the fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0307—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements
    • B01D33/033—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
    • B01D33/39—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D33/763—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Earth Drilling (AREA)
  • Eye Examination Apparatus (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A pressure diffuser (10) includes in a liquid-tight pressurized vessel (12) a vertical screen (24) which defines with a vessel wall (14) first and second interior volumes (26, 29) for transmitting pulp from a pulp inlet to a pulp outlet and receiving displacement (e.g. wash or bleach) liquid transmitted from headers (28) through the pulp. The screen ends around housing members (20, 22) have different cross-sectional areas, and quick movement of the screen effects backflushing. The volumes (26, 29) are segregated by the vertical, generally cylindrical, screen (24). A chamber (42) is provided in communication on opposite sides of a piston (44) therein with the pulp adjacent the pulp inlet (16), and the extracted liquid (in 29). By displacing the piston with a cylinder (50) immediately prior to rapidly moving the screen vertically with a hydraulic cylinder (50) to effect backflushing through the screen, the pulp pressure on the screen is reduced and at the same time shocks and compaction of the pulp adjacent the inlet caused by the movement of the screen are avoided.
NO893301A 1988-08-18 1989-08-17 Method of backwashing a strainer in a pulping apparatus NO174782C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/233,366 US4908896A (en) 1987-11-27 1988-08-18 Backflushing pressure diffuser screens

Publications (4)

Publication Number Publication Date
NO893301D0 NO893301D0 (en) 1989-08-17
NO893301L NO893301L (en) 1990-02-19
NO174782B NO174782B (en) 1994-03-28
NO174782C true NO174782C (en) 1994-07-06

Family

ID=22876943

Family Applications (1)

Application Number Title Priority Date Filing Date
NO893301A NO174782C (en) 1988-08-18 1989-08-17 Method of backwashing a strainer in a pulping apparatus

Country Status (9)

Country Link
US (1) US4908896A (en)
EP (1) EP0356415B1 (en)
JP (1) JPH0268379A (en)
AT (1) ATE117386T1 (en)
BR (1) BR8904117A (en)
DE (1) DE68920668T2 (en)
FI (1) FI92415C (en)
NO (1) NO174782C (en)
SE (1) SE468678B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE462435B (en) * 1988-11-11 1990-06-25 Kamyr Ab MAKE STABILIZING THE PRESSURE AND LIQUIDIZATION COUNTRIES IN A SILVER AND SILVER DEVICE
US5129119A (en) * 1991-04-09 1992-07-14 Glentech Inc. Diffuser efficiency
US5567262A (en) * 1991-04-16 1996-10-22 Ahlstrom Machinery Inc. Two stage pressure diffuser
US5187956A (en) * 1991-06-20 1993-02-23 Kamyr, Inc. Preventing clogging in pressure diffusers
US5444884A (en) * 1994-07-15 1995-08-29 Kamyr, Inc. Controlling screen backflush and wash distribution in a pressure diffuser
SE9901668A0 (en) 1998-05-07 2000-11-07 J Robert Prough Plate diffuser for treating comminuted cellulosic fibrous material
JP5757700B2 (en) * 2009-08-03 2015-07-29 アンドリッツ・テクノロジー・アンド・アセット・マネージメント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング Pressure diffuser internal guide
CN102575424B (en) * 2009-08-25 2014-08-13 维美德公司 Pressure diffuser with less power rating in hydraulic system
CN102877345A (en) * 2012-10-31 2013-01-16 江苏大唐机械有限公司 Paper-making raw material washing and dewatering equipment
US8888958B2 (en) * 2012-12-31 2014-11-18 Andritz Inc. Pressure diffuser with an annular baffle screen plate over water inlet
CN106237688A (en) * 2015-08-29 2016-12-21 无锡亮慧环保机械有限公司 Resistant to pollution air supporting vibration filtering structure
CN106237687A (en) * 2015-08-29 2016-12-21 无锡亮慧环保机械有限公司 Floating air-flotation type vibration filtering structure
CN106237689A (en) * 2015-08-29 2016-12-21 无锡亮慧环保机械有限公司 Floating air-flotation type pollution-resistant vibration filtering structure
CN116173593B (en) * 2023-04-24 2023-08-01 惠州市宝惠电子科技有限公司 Transformer immersion oil filter equipment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE394822B (en) * 1975-04-15 1977-07-11 Kamyr Ab METHOD AND DEVICE FOR DRAINING MOVEMENT SUSPENSIONS
SE394821B (en) * 1975-04-15 1977-07-11 Kamyr Ab METHOD AND DEVICE FOR DRAINING MOVEMENT SUSPENSIONS
US4172037A (en) * 1975-10-10 1979-10-23 Kamyr Inc. Continuous process diffuser
SE435400B (en) * 1980-01-10 1984-09-24 Kamyr Ab SILAN SYSTEM FOR DEDUCTION OF LIQUID FROM SUSPENSIONS IN MOVEMENT
FI68686C (en) * 1980-01-10 1985-10-10 Kamyr Ab ANORDNING FOER BEHANDLING AV STROEMMANDE SUSPENSIONER
DE3173030D1 (en) * 1980-12-31 1986-01-02 Kamyr, Ab A method of controlling a pressure-tight vessel for treating cellulosic pulp
GB2159725B (en) * 1984-06-09 1988-06-02 Klimatank Holdings Limited Filter apparatus
US4793161A (en) * 1987-11-27 1988-12-27 Kamyr Ab Effective diffuser/thickener screen backflushing

Also Published As

Publication number Publication date
SE468678B (en) 1993-03-01
DE68920668T2 (en) 1995-07-06
NO893301L (en) 1990-02-19
JPH0268379A (en) 1990-03-07
FI893836A0 (en) 1989-08-15
EP0356415A3 (en) 1991-08-28
EP0356415A2 (en) 1990-02-28
SE8902653L (en) 1990-02-19
FI92415C (en) 1994-11-10
FI893836A (en) 1990-02-19
EP0356415B1 (en) 1995-01-18
BR8904117A (en) 1990-04-10
NO893301D0 (en) 1989-08-17
SE8902653D0 (en) 1989-08-03
NO174782B (en) 1994-03-28
ATE117386T1 (en) 1995-02-15
JPH0437195B2 (en) 1992-06-18
US4908896A (en) 1990-03-20
FI92415B (en) 1994-07-29
DE68920668D1 (en) 1995-03-02

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